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Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

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Pull ARM fixes from Russell King:
 "Three fixes and a resulting cleanup for -rc2:

   - Andre Przywara reported that he was seeing a warning with the new
     cast inside DMA_ERROR_CODE's definition, and fixed the incorrect
     use.

   - Doug Anderson noticed that kgdb causes a "scheduling while atomic"
     bug.

   - OMAP5 folk noticed that their Thumb-2 compiled X servers crashed
     when enabling support to cover ARMv6 CPUs due to a kernel bug
     leaking some conditional context into the signal handler"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8425/1: kgdb: Don't try to stop the machine when setting breakpoints
  ARM: 8437/1: dma-mapping: fix build warning with new DMA_ERROR_CODE definition
  ARM: get rid of needless #if in signal handling code
  ARM: fix Thumb2 signal handling when ARMv6 is enabled
This commit is contained in:
Linus Torvalds
2015-09-19 21:05:02 -07:00
parent 30ec568248 7ae85dc768
commit 99bc7215bc
3 changed files with 17 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm/kernel/kgdb.c
View File

@@ -259,15 +259,17 @@ int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
if (err)
return err;
patch_text((void *)bpt->bpt_addr,
*(unsigned int *)arch_kgdb_ops.gdb_bpt_instr);
/* Machine is already stopped, so we can use __patch_text() directly */
__patch_text((void *)bpt->bpt_addr,
*(unsigned int *)arch_kgdb_ops.gdb_bpt_instr);
return err;
}
int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt)
{
patch_text((void *)bpt->bpt_addr, *(unsigned int *)bpt->saved_instr);
/* Machine is already stopped, so we can use __patch_text() directly */
__patch_text((void *)bpt->bpt_addr, *(unsigned int *)bpt->saved_instr);
return 0;
}

15
arch/arm/kernel/signal.c
View File

@@ -343,15 +343,18 @@ setup_return(struct pt_regs *regs, struct ksignal *ksig,
*/
thumb = handler & 1;
#if __LINUX_ARM_ARCH__ >= 7
/*
* Clear the If-Then Thumb-2 execution state
* ARM spec requires this to be all 000s in ARM mode
* Snapdragon S4/Krait misbehaves on a Thumb=>ARM
* signal transition without this.
* Clear the If-Then Thumb-2 execution state. ARM spec
* requires this to be all 000s in ARM mode. Snapdragon
* S4/Krait misbehaves on a Thumb=>ARM signal transition
* without this.
*
* We must do this whenever we are running on a Thumb-2
* capable CPU, which includes ARMv6T2. However, we elect
* to always do this to simplify the code; this field is
* marked UNK/SBZP for older architectures.
*/
cpsr &= ~PSR_IT_MASK;
#endif
if (thumb) {
cpsr |= PSR_T_BIT;

4
arch/arm/mm/dma-mapping.c
View File

@@ -1249,7 +1249,7 @@ __iommu_create_mapping(struct device *dev, struct page **pages, size_t size)
struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
dma_addr_t dma_addr, iova;
int i, ret = DMA_ERROR_CODE;
int i;
dma_addr = __alloc_iova(mapping, size);
if (dma_addr == DMA_ERROR_CODE)
@@ -1257,6 +1257,8 @@ __iommu_create_mapping(struct device *dev, struct page **pages, size_t size)
iova = dma_addr;
for (i = 0; i < count; ) {
int ret;
unsigned int next_pfn = page_to_pfn(pages[i]) + 1;
phys_addr_t phys = page_to_phys(pages[i]);
unsigned int len, j;